Apparatus for the manufacture of sulfuric anhydrid.



No. 688,469. T Patented Doc. ID, I90I.

n. KNIETSCH. Y

vAPPARATUS FOR THE MANUFACTURE OF SULFUBIG ANHYDBID.

(Applicgtion'flled Aug. 18, 1899.)

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UNITED STATES PATENT @FFIQEQ RUDOLF KNIETSOILOF IUDWIGSHAFEN, GERMANY, ASSIGNOR TO THE BADISCHE'ANILIN- & SODA-FABRIK, OF LUDWIGSHAFEN, GERMANY,

A CORPORATION 01? GERMANY;

APPARATUS FOR THE MANUFACTURE OF SULFURIC ANHYDRID.

SPECIFICATION formingpart of Letters Patent No. 688,469, dated December 10, 1901.

Original application filed July 14,' 1898, 5lerial No. 685,969. Divided and this application filed August 18, 1899. Serial No. 727,636. (No models) T0 61/ whom, it mag concern:

Be it known that I, RUDOLF KNIETSOH, doctor of philosophy, a subject of the King of Prussia, Emperor of Germany, residing at Ludwigshafen-onthe-Rhine, in the Kingdom of Bavaria and Empire of Germany, have invented new and useful Improvements in Apparatus for the Manufacture of Sulfuric Anhydrid, of which the following is a specification.

In my application, Serial No. 685,969, filed July 14, 1898, I have described the apparatus which is the subject of this application and included it within generic claims, and I file this as a division of said application for the purpose of securing specific claims on said apparatus.

In the accompanying drawings, Figure 1 is a vertical section of an apparatus containing a single contact-chamber represented by a tube or pipe B. Fig. 2 is a vertical section of an apparatus containing a plurality. of contact chambers represented by tubes or pipes R.

Referring, first, to Fig. 1, M represents-a brickwork structure or an iron pipe. Within this a pipe R is fixed, leaving the passage S between. This pipe It consists of two parts a and b, which have different functions and may differ from one another in length and di ameter. Also, either part can be replaced by a plurality of narrower pipes. The portion 6 of the pipe R is occupied by the contact substance, (indicated in the drawings by broken section-lines,) and this is cooled by the cold air entering the passage S at n. In the other part, a, of the pipe R the gases containing the sulfur dioxid, which enter at O, are heated to the temperature necessary for the reaction. When'commencing the operation, the whole apparatus is first raised to the temperature necessary for the. reaction by heating by means of h h-say gas-flames. Then when gases rich in sulfur dioxid are used after the reaction has once commenced further heating is unnecessary, because the air as it passes through the pipe M in contact with that part b of the pipeR in which the reaction is in progress in extracting the excess of heat due to the reaction absorbs the heat and transfers sufficient heat to the other portion a to prevent a change of position of the reaction zone or the entire cessation of the reaction. The current of air can be regulated by means of the updraft-openings L L, which are adjustable by the slides Z Z. It is regulated in such a way that the contact substance in b is constantly maintained at the most favorable temperature for the reaction. When'the gases contain but little sulfur dioxid, the air, which is somewhat heated by its cooling action on the contact substance, is furtherheated by suitable means h h, such as gas-flames, so that the gases in flowing through'part a receive a greater increment of heat. When the gases are still poorer in sulfur dioxid, it may be necessary to continually heat to some extent the current of air flowing in through at, either by means of the gas-flames at h h or in some other way. The gases containing the sulfuric anhydrid issuing from the contactchamber b leave the apparatus by the pipe 0 and are worked up in any suitable way. 7

The apparatus represented in Fig. 2 is made up of a plurality of contact-tubes R R, which are in connection with one another by means of the two tube-plates W -W and the covers D D above and below. In other respects it resembles Fig. 1.

Iclaim- 1. In an apparatus for manufacturing sulfuric an hydrid by the contact process, in com bination an inclosure R containing ingress and. egress openings through which ingress gas containing sulfur dioxid and oxygen passes, the contact material occupying a portion of said inclosure near the egress therefrom and a cooling-fluid conduit containing inlet and outlet openings independent of said ingress and egress openings, wherebya cooling fluid is led adjacent to said inclosure from the egress end toward the ingress end thereof, whereby the excess of heat due to the reaction is transferred by said cooling fluid from the contact material to the gases on their way to the contact material.

2. In an apparatus for manufacturing sulf uric anhydrid,by the contact process, in com-v bination an inclosure R containing ingressgas containing sulfur-dioxid and oxygen passes, the contact material occupying a por* tion of said inclosure near the egress therefrom, a cooling-fluid conduit whereby a current of cooling fluid is led adjacent to said inclosure from the egress end thereof toward the ingress end thereof, and a means of heating, h, whereby that portion of said inclosure not containing said contact material may be heated.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

R'UDOLF KNIETSOI-I.

\Vitnesses:

ERNEST F. EHRHARDT, BERNHARD O. HESSE. 

